Touch display panel having pressure detecting function, display device and driving method

ABSTRACT

A touch display panel having a pressure detecting function, a display device and a driving method are provided. The touch display panel includes: an array substrate and a counter substrate that are arranged opposite to each other; a plurality of touch electrodes disposed on the counter substrate and a touch electrode wiring electrically connected to each of the touch electrodes; a plurality of pressure detecting electrodes disposed on the counter substrate or the array substrate and a pressure detecting electrode wiring electrically connected to each of the pressure detecting electrodes, wherein any one of the pressure detecting electrodes overlaps with at least one of the touch electrodes in a direction perpendicular to the counter substrate, and with respect to the pressure detecting electrode, the touch electrode is closer to a light exit side of the touch display panel.

TECHNICAL FIELD

Embodiments of the present invention relate to a touch display panelwith pressure detecting function, a display device and a driving method.

BACKGROUND

Pressure sensing technology is a technology that can detect an externalforce, for example, a pressure in the current environment can be testedto determine whether it is consistent with its physical adaptabilitythrough the technology, and can enable customers to get a betterhuman-computer interaction experience. As a result, many manufacturesare looking for appropriate solutions to achieve pressure test in adisplay area, especially a portable electronic device such as a cellphone or a tablet.

At present, in field of the display, an additional institution isgenerally added in a backlight module of a liquid crystal display device(referred to as LCD) or the mid frame of a cell phone to achieve thepressure detection. However, the design needs to change the structuraldesign of the liquid crystal display device, and a detecting accuracy ofthe design is limited due to a large assembly tolerance.

SUMMARY

Embodiments according to the present invention provide a touch displaypanel with pressure detecting function, comprising: an array substrateand an opposed substrate that are disposed opposite to each other; aplurality of touch electrodes and touch electrode wirings electricallyconnected to each of the touch electrodes disposed on the opposedsubstrate; a plurality of pressure detecting electrodes and pressuredetecting electrode wirings electrically connected to each of thepressure detecting electrodes disposed on the opposed substrate or thearray substrate; wherein, any of the pressure detecting electrodesoverlaps with at least one of the touch electrodes in a directionperpendicular to the opposed substrate; the touch electrodes are closerto a light exit side of the touch display panel with respect to thepressure detecting electrodes.

In some examples, the pressure detecting electrodes also used as commonelectrodes.

In some examples, the pressure detecting electrodes are disposed on thearray substrate.

In some examples, the array substrate further comprises a thin filmtransistor, a gate line and a data line; the gate line is disposed onthe same layer as a gate electrode of the thin film transistor, the dataline is disposed on the same layer as a source electrode and a drainelectrode of the thin film transistor; the pressure detecting electrodewirings are disposed on the same layer as the gate line or the dataline.

In some examples, the array substrate further comprises auxiliarywirings located in a non-display area, the auxiliary wirings correspondto the touch electrode wirings one by one, and the auxiliary wirings areelectrically connected to the touch electrode wirings.

In some examples, the opposed substrate further comprises a blackmatrix; the touch electrodes are of a lattice structure, and located ona side of the black matrix closed to the array substrate andcorresponding to the black matrix; wherein, the touch electrodes have amaterial of metal.

In some examples, a capacitor is formed between each of the pressuredetecting electrodes and at least one of the touch electrodesoverlapping therewith.

Other embodiments according to the present invention provide a displaydevice, comprising: the touch display panel, and a first integratedcircuit (IC) connected to the touch electrode wiring and a second ICconnected to the pressure detecting wiring.

In some examples, the display device further comprises a metal backshell, and the touch display panel is disposed on the metal back shell.

In some examples, the pressure detecting electrodes are disposed on thearray substrate, the array substrate comprises a pixel electrode; thepressure detecting electrodes are closer to the metal back shell withrespect to the pixel electrode on the array substrate.

In some examples, a capacitor is formed between the pressure detectingelectrodes and the metal back shell.

Other embodiments according to the present invention provide a drivingmethod of the display device, comprising: a touch phase in which thefirst IC inputs a drive signal to the touch electrodes through the touchelectrode wirings and receives a feedback signal to identify a touchposition; a pressure detecting phase in which the first IC inputs afixed voltage signal to the touch electrodes through the touch electrodewirings, the second IC inputs a drive signal to the pressure detectingelectrodes through the pressure detecting wirings and receives afeedback signal to detect a pressure value; and a signal line betweenthe pressure detecting electrodes and the touch electrodes is controlledin a high resistance state; wherein, the signal line comprises at leastone of a gate line and a data line.

In some examples, the display device further comprises a metal backshell, a capacitor is formed between the pressure detecting electrodesand the metal back shell, in the pressure detecting phase, the drivingmethod further comprises: controlling a signal line between the pressuredetecting electrodes and the metal back shell in a high resistancestate.

In some examples, the display device comprises a third IC connected tothe gate line and a fourth IC connected to the data line, the drivingmethod further comprising: a display phase in which the third IC inputsa scanning signal to the gate line in a line sequence, the fourth ICinputs a data signal to the data line; and the first IC and the secondIC input common voltage signals to the touch electrodes and the pressuredetecting electrodes, respectively; wherein, the pressure detectingelectrodes also used as common electrodes.

In some examples, in the touch phase, modulation signals with the samefrequency and the same amplitude as those for the touch electrodes aresimultaneously input from the second IC to the pressure detectingelectrodes, from the third IC to the gate line, and from the fourth ICto the data line.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to clearly illustrate the technical solution of the embodimentsof the present invention, the drawings of the embodiments will bebriefly described in the following; it is obvious that the drawings inthe description are only related to some embodiments of the presentinvention and not limited to the invention.

FIG. 1 is a first structural view of a touch display panel with pressuredetecting function provided by embodiments of the present invention;

FIG. 2 is a second structural view of a touch display panel withpressure detecting function provided by embodiments of the presentinvention;

FIG. 3 is a top view of a touch display panel with pressure detectingfunction provided by embodiments of the present invention;

FIG. 4 is a structural view of a touch liquid crystal display panel withpressure detecting function provided by embodiments of the presentinvention;

FIG. 5 is a first top view of an array substrate of a touch liquidcrystal display panel with pressure detecting function provided byembodiments of the present invention;

FIG. 6 is a top view of an opposed substrate of a touch liquid crystaldisplay panel with pressure detecting function provided by embodimentsof the present invention;

FIG. 7 is a second top view of an array substrate of a touch liquidcrystal display panel with pressure detecting function provided byembodiments of the present invention;

FIG. 8 is a structural view of a display device provided by embodimentsof the present invention;

FIG. 9 is a first flow chart of a driving method provided by embodimentsof the present invention;

FIG. 10 is a sequence chart in the working process of a display deviceprovided by embodiments of the present invention;

FIG. 11 is a second flow chart of a driving method provided byembodiments of the present invention.

DETAILED DESCRIPTION

In order to make objects, technical details and advantages of theembodiments of the present invention, the technical solutions of theembodiments will be described in a clearly and fully understandable wayin connection with the drawings related to the embodiments of thepresent invention. Apparently, the described embodiments are just a partbut not all of the embodiments of the present invention. Based on thedescribed embodiments herein, those skilled in the art can obtain otherembodiment(s), without any inventive work, which should be within thescope of the present invention.

Unless otherwise defined, the technical terminology or scientificterminology used herein should have the general meanings understood bythose skills in the art to which the present invention belongs. The“first”, “second” and similar words used in the present inventionapplication specification and claims do not mean any sequence, amount orimportance, but are merely used to distinguish different components.Likewise, “a” or “an” or similar words do not mean the limitation toamount, instead, it refers to at least one. “Connecting” or “connected”and similar words are not limited to the physical or mechanicalconnection, but may comprise electrical connection, no matter directlyor indirectly. “Over”, “under” and the like are merely used to denotethe relative location relationship which based on the relationshipdescribed in drawings, and only to describe the present inventionconveniently.

Embodiments of the present invention provide a touch display panel 01with pressure detecting function, as illustrated in FIG. 1-FIG. 4, thetouch display panel comprises: an opposed substrate 02 and an arraysubstrate 03 that are disposed opposite to each other, a plurality oftouch electrodes 10 and touch electrode wirings 20 electricallyconnected to each of the touch electrodes 10 disposed on the opposedsubstrate 02; a plurality of pressure detecting electrodes 30 andpressure detecting electrode wirings 40 electrically connected to eachof the pressure detecting electrodes 30 disposed on the opposedsubstrate 02 or the array substrate 03; and any of the pressuredetecting electrodes 30 corresponds to at least one of the touchelectrodes 10, that is, in a direction perpendicular to the opposedsubstrate 02, the pressure detecting electrodes 30 are overlapped withat least one of the touch electrodes 10; the touch electrodes 10 arecloser to a light exit side of the touch display panel 01 with respectto the pressure detecting electrodes 30.

In embodiments of the present invention, the principle for achieving atouch function is: due to effect of the electric field in a human body,when a finger contacts a light exit side of the touch display panel 01,as a conductor, the finger forms an external capacitor (Cf) togetherwith the touch electrodes 10 on the opposed substrate 02. The externalcapacitor (Cf) and a self inductance capacitor (Cp) of the touch controlelectrode 10 form a coupling electric field between the touch controlelectrode (10) and the fingers, which can change the size of the selfinductance capacitor (Cp). According to the change of the capacitance onthe touch point position, the touch point position is calculated, andthe touch function is achieved.

The principle for achieving pressure detecting is: due to the pressuredetecting electrodes 30 correspond to at least one of the touchelectrodes 10, according to the formula of parallel plate capacitance,that is

${C \propto {ɛ\; \frac{S}{d}}},$

when an overlapping area (S) exists between the pressure detectingelectrodes 30 and the touch electrodes 10 along a direction of adistance (d) of the two, a capacitance (C) is generated between the two.On the basis of this, when the touch display panel 01 is not underpressure, the capacitance between the pressure detecting electrodes 30and the corresponding touch electrodes 10 is fixed. When the touchdisplay panel 01 is subjected to a pressure, the distance between thepressure detecting electrodes 30 and the touch electrodes 10 changes dueto a deformation of the touch display panel 01, so that the capacitancebetween the pressure detecting electrodes 30 and the corresponding touchelectrodes 10 changes, and a pressure value can be obtained by acorresponding conversion.

It should be noted that, the touch electrodes 10 correspond to the touchelectrode wirings 20 one by one, and the touch electrodes 10 areelectrically connected to the touch electrode wirings 20. They can belocated in the same layer and are electrically connected directly, andcan also be located in different layers, and are electrically connectedthrough a through hole.

The pressure detecting electrodes 30 correspond to the pressuredetecting electrode wirings 40 one by one, and the pressure detectingelectrodes 30 are electrically connected the pressure detectingelectrode wirings 40. They can be located in the same layer and areelectrically connected directly, and can also be located in differentlayers, and are electrically connected through a through hole.

Furthermore, FIG. 3 only illustrates schematically the connection waybetween the touch electrodes 10 and the touch electrode wirings 20,however, embodiments of the present invention are not limited to thiswith respect to the connection way between the pressure detectingelectrodes 30 and the pressure detecting electrode wirings 40.

The pressure detecting electrodes 30 can be located on the arraysubstrate 03 as illustrated in FIG. 1, and can also be located on theopposed substrate 02. Although the pressure detecting wirings 40 are notillustrated in FIG. 1 and FIG. 2, the pressure detecting electrodes 30and the pressure detecting electrode wirings 40 are located on the samesubstrate.

According to the accuracy of pressure detection, along a directionperpendicular to the touch display panel 01, a projection area of thepressure detecting electrodes 30 on the opposed substrate 02 or thearray substrate 03 can be adjusted appropriately. When the accuracy ofpressure detection is higher, the projection area of the pressuredetecting electrodes 30 is smaller. When the accuracy of pressuredetection is lower, the projection area of the pressure detectingelectrodes 30 is larger.

Furthermore, the pressure detecting electrodes 30 has a material oftransparent conductive material, such as ITO, so that to avoid theimpact on the normal display of the touch display panel 01.

The material of the touch electrodes 10 is not limited, and the touchelectrodes 10 can be made of a transparent conductive material or ametal material. When the touch electrodes 10 are made of a metalmaterial, as illustrated in FIG. 4, in order not to affect the display,the touch electrodes 10 should be set at a position corresponding to ablack matrix 90.

As illustrated in FIG. 4, the touch display panel 01 can be a touchliquid crystal display panel, on this basis, the opposed substrate 02can be a color filter substrate, which further comprises a black matrix,a red color filter R, a green color filter G and a blue color filter B,and also comprises a common electrode certainly. The array substrate 03comprises a thin film transistor (not illustrated in FIG. 4), a pixelelectrode 60 and so on. Of course, the array substrate 03 furthercomprises a common electrode in the case that the opposed substrate 02does not comprise the common electrode.

The touch display panel 01 can also be an organic light emitting diodedisplay panel, on this basis, the opposed substrate 02 can be a packagesubstrate. The array substrate 03 comprises a thin film transistor, ananode electrically connected to a drain of the thin film transistor,cathode, and an organic material functional layer between the anode andthe cathode.

Embodiments of the present invention provide the touch display panel 01with pressure detecting function, on one aspect, the recognition of thetouch position can be realized by setting the touch electrodes 10 andtouch electrode wirings 20. On the other aspect, a capacitor is formedbetween the pressure detecting electrodes 30 and the touch electrodes 10by setting the pressure detecting electrodes 30. When the touch displaypanel 01 is subjected to a pressure, a capacitance value of thecapacitor is changed, the pressure can be detected through the pressuredetecting electrode wirings 40 sending a signal which indicates thecapacitance value to a corresponding IC (integrated circuit). Comparedwith an additional mechanism needed in the prior art, the presentinvention can be realized by mostly adding a corresponding patterningprocess in the preparation process of the display panel, and a mechanismdesign of the device does not need to be changed.

In some examples, as illustrated in FIG. 4, the touch display panel isthe touch liquid crystal display panel, the pressure detectingelectrodes 30 are also used as common electrodes 100. That is to say, alayer of the common electrodes 100 are also used as a layer of thepressure detecting electrodes 30.

For example, a transparent electrode layer can be divided into aplurality of regions, in a display phase, each of the regions is onecommon electrode 100, and in a pressure detecting phase, each of theregions is one pressure detecting electrode 30.

Thus, in spite of the fact that embodiments of the present invention areprovided with the pressure detecting electrodes 30, the number ofpatterning processes is not increased.

It should be noted that, the transparent electrode layer disposed on thearray substrate 03 is as an example as illustrated in FIG. 4, thetransparent electrode layer can also be disposed on the opposedsubstrate 02.

In some examples, as illustrated in FIG. 4 and FIG. 5, the pressuredetecting electrodes 30 are disposed on the array substrate 03.

The array substrate 03 further comprises a thin film transistor 50, apixel electrode 60, a gate line 70 and a data line 80; the thin filmtransistor comprises a gate electrode, a gate insulating layer, anactive layer, a source and a drain, the drain electrode is electricallyconnected to the pixel electrode 60, the source electrode iselectrically connected to the data line 80, and the gate electrode iselectrically connected to the gate line 70.

Thus, in the display phase, the use of advanced super dimensionalswitching (referred to as ADS) can improve an image quality of thedevice, and the device can be with high resolution, high transmissionrate, low power consumption, wide viewing angle, high aperture ratio,low color, and no squeezing water ripple (Push Mura) etc. Due to thecommon electrodes 100 are also used as the pressure detecting electrodes30, and the accuracy of the pressure detecting electrodes 30 are notnecessarily as small as a sub-pixel size. In embodiments of the presentinvention, the common electrodes 100 are plate electrodes, the pixelelectrode 60 is a strip electrode, and the pixel electrode 60 is locatedabove the common electrodes 100.

In some examples, the pressure detecting electrode wirings 40 aredisposed on the same layer as the gate line 70, or the pressuredetecting electrode wirings 40 are disposed on the same layer as thedata line 80. The gate line 70 is disposed on the same layer as the gateelectrode of the thin film transistor 50, and the data line 80 isdisposed on the same layer as the source electrode and the drainelectrode of the thin film transistor 50.

In this way, the increase of the number of the patterning process causedby the formation of the pressure detecting electrodes 40 is alsoavoided.

For example, the touch electrodes 10 on the opposed substrate 02 canhave a material of metal. Because of a metal material has a lowresistance, a touch sensitivity can be improved.

In some examples, as illustrated in FIG. 6, the touch electrodes 10 areof a lattice structure, and as illustrated in 4, the touch electrodes 10located on a side of the black matrix 90 closed to the array substrate02 and corresponding to the black matrix 90.

In this way, the influence on display by the touch electrodes 10 can beavoided.

Furthermore, since the touch electrode wirings 20 located on the opposedsubstrate 02 need to be connected to a corresponding integrated circuit(IC) to drive the touch electrodes 10 to identify a touch position, acircuit board provided with the IC is required to be pressed on theopposed substrate 02 to provide a signal to the touch electrode wirings20. And for the array substrate 03, a corresponding circuit board needsto be pressed on the array substrate 03, in order to provide a signal tothe gate line 70, the data line 80, and so on. Therefore, in embodimentsof the present invention, all of the IC can be integrated on the circuitboard which is pressed on the array substrate 03. For example, asillustrated in FIG. 7, auxiliary wirings 110 can be disposed on anon-display area 04 of the array substrate, the auxiliary wirings 110correspond to the touch electrode wirings 20 one by one, and theauxiliary wirings 110 are electrically connected to the touch electrodewirings 20 by conductive adhesive.

It should be noted that, the non-display area 04 is relative to adisplay area, which located around the display area. The display area isused to display pictures, and the non-display is used to extract thegate line 70, the data line 80, etc. in the display area to connect tothe IC on the circuit board. For example, the non-display area 04 isdisposed on the periphery of the display area.

Embodiments of the present invention further provide a display device,the display device comprises the touch display panel 01, and a firstintegrated circuit (IC) connected to the touch electrode wirings 20 anda second IC connected to the pressure detecting wirings 40. The first ICand the second IC are disposed on a circuit board.

Furthermore, the display device further comprises a third IC connectedto the gate line 70 and a fourth IC connected to the data line 80.

For example, as illustrated in FIG. 8, the display device furthercomprises a metal back shell 05; the touch display panel 01 is disposedon the metal back shell 05.

In the condition that a back shell of the display device is the metalback shell, a capacitor can also be formed between the pressuredetecting electrodes 30 and the grounded metal back shell 05 inembodiments of the present invention.

Thus, sum of the capacitance formed between the pressure detectingelectrodes 30 and the touch electrodes 10 as well as that between thepressure detecting electrodes 30 and the metal back shell 05 can detectthe pressure. That is, when the display device is under pressure, thedeformed touch display panel 01 resulting in that a distance between thepressure detecting electrodes 30 and the touch electrodes 10 as well asthat the pressure detecting electrodes 30 and the metal back shell 05becomes small, so that make the sum of the capacitance formed betweenthe pressure detecting electrodes 30 and the touch electrodes 10 as wellas that between the pressure detecting electrodes 30 and the metal backshell 05 becomes large. By comparing with the sum of the capacitanceformed between the pressure detecting electrodes 30 and the touchelectrodes 10 as well as that between the pressure detecting electrodes30 and the metal back shell 05 upon being subjected to no pressure, thepressure value can be obtained through a corresponding conversion.

Since the capacitance formed in embodiments of the present invention isthe sum of the capacitance between the pressure detecting electrodes 30and the touch electrodes as well as that the pressure detectingelectrodes 30 and the metal back shell 05, the capacitance value islarger and easy to recognize, so that to improve the detecting accuracy.

In some examples, as illustrated in FIG. 8, the pressure detectingelectrodes 30 are disposed on the array substrate 03; the pressuredetecting electrodes are closer to the metal back shell 05 with respectto the pixel electrode 60 on the array substrate 03.

Due to the overlapping area between the pressure detecting electrodes 30and the metal back shell 05 is larger, so in order to further improvethe detecting accuracy, controlling the distance between the pressuredetecting electrodes 30 and the metal back shell 05 to be smaller toincrease the capacitance between them. On the basis of this, it is alsopossible to avoid the influence of the pixel electrode 60 on thecapacitor between the pressure detecting electrodes 30 and the metalback shell 05.

Embodiments of the present invention further provide a driving method ofthe display device, as illustrated in FIG. 9, the driving methodcomprises following steps.

S10: as illustrated in FIG. 10, in a touch phase P2, the first IC inputsa drive signal to the touch electrodes 10 through the touch electrodewirings 20 and receives a feedback signal to identify a touch position.

Here, the pressure detecting electrodes 30, a signal line and so on canbe controlled not to work, modulation signals with the same frequencyand the same amplitude as those for the touch electrodes 10 can also becertainly input to the pressure detecting electrodes 30, and the signallines. The signal line comprises the gate line 70 and/or data line 80.

As illustrated in FIG. 10, in the touch phase P2 in embodiments of thepresent invention, the modulation signals with the same frequency andthe same amplitude as those for the touch electrodes 10 aresimultaneously input from the second IC to the pressure detectingelectrodes 30, from the third IC to the gate line 70, and from thefourth IC to the data line 80, so as to avoid the influence of thepressure detecting electrodes 30, the gate line 70 and the data line 80etc. on the touch electrodes 10, and to improve the recognition accuracyof the touch position.

S11: as illustrated in FIG. 10, in a pressure detecting phase P3, thefirst IC inputs a fixed voltage signal (such as a common voltage Vcomsignal) to the touch electrodes 10 through the touch electrode wirings20, the second IC inputs a drive signal to the pressure detectingelectrodes 30 through the pressure detecting wirings 40 and receives afeedback signal to detect a pressure value; and a signal line betweenthe pressure detecting electrodes 30 and the touch electrodes 10 iscontrolled in a high resistance state.

Furthermore, controlling the signal line between the pressure detectingelectrodes 30 and the touch electrodes 10 in the high resistance state,the purpose is to avoid the shielding of the signal line to thecapacitor between the pressure detecting electrodes 30 and the touchelectrodes 10.

The signal line between the pressure detecting electrodes 30 and thetouch electrodes 10 can be the gate line 70, can also be the data line80, and can also be the gate line 70 and the data line 80.

It should be noted that, the first IC and the second IC can be differentICs, and can also be the same IC, it is not limited here.

Furthermore, controlling the signal line between the pressure detectingelectrodes 30 and the touch electrodes 10 in the high resistance state,for example, the third IC connected to the gate line 70 is controlled asinternal disconnection so that the gate line 70 is in the high impedancestate. The fourth IC connected to the data line 80 is controlled asinternal disconnection so that the data line 80 is in the high impedancestate.

The driving method provided in embodiments of the present invention, onone aspect, the touch position can be realized by inputting the drivingsignal to the touch electrodes 10 and receiving the feedback signal. Onethe other aspect, a capacitor is formed between the touch electrodes 10and the pressure detecting electrodes 30 by inputting the fixed voltagesignal to the touch electrodes 10 and inputting the driving signal tothe pressure detecting electrodes 30. On the basis of this, when thetouch display panel 01 is subject to a pressure, the capacitance betweenthem is changed, and the pressure detecting can be realized by thefeedback signal of the pressure detecting electrodes 30.

In some examples, in the condition that the display device furthercomprises a metal back shell 05, in the pressure detecting phase, thedriving method further comprises: controlling a signal line between thepressure detecting electrodes 30 and the metal back shell 05 in a highresistance state.

That is, in this condition, the third IC is controlled as internaldisconnection so that the gate line 70 is in the high impedance state.The fourth IC is controlled as internal disconnection so that the dataline 80 is in the high impedance state.

In some examples, as illustrated in FIG. 11, the driving method furthercomprises:

S12: refer to FIG. 10, in a display phase P1, the third IC inputs ascanning signal to the gate line 70 in a line sequence, the fourth ICinputs a data signal to the data line 80; and the second IC inputs acommon voltage signal to the pressure detecting electrodes 30, and thefirst IC inputs a common voltage signal to the touch electrodes 10.

In the display phase, the pressure detecting electrodes 30 are also usedas common electrodes. The touch electrodes 10 are used as a shieldinglayer to shield an external signal by inputting the common voltagesignal to the touch electrodes 10.

The foregoing are only some specific embodiments of the presentinvention, and the protection scope of the invention is not limitedthereto. Therefore, the protection scope of the invention is defined bythe claims.

The application claims priority to the Chinese patent application No.201510580210.7, filed on Sep. 11, 2015, the entire present invention ofwhich is incorporated herein by reference as part of the presentapplication.

1. A touch display panel with pressure detecting function, comprising:an array substrate and an opposed substrate that are disposed oppositeto each other; a plurality of touch electrodes and touch electrodewirings electrically connected to each of the touch electrodes disposedon the opposed substrate; a plurality of pressure detecting electrodesand pressure detecting electrode wirings electrically connected to eachof the pressure detecting electrodes disposed on the opposed substrateor the array substrate; wherein, any of the pressure detectingelectrodes overlaps with at least one of the touch electrodes in adirection perpendicular to the opposed substrate; the touch electrodesare closer to a light exit side of the touch display panel with respectto the pressure detecting electrodes.
 2. The touch display panelaccording to claim 1, wherein, the pressure detecting electrodes arealso used as common electrodes.
 3. The touch display panel according toclaim 2, wherein, the pressure detecting electrodes are disposed on thearray substrate.
 4. The touch display panel according to claim 3,wherein, the array substrate further comprises a thin film transistor, agate line and a data line; the gate line is disposed on the same layeras a gate electrode of the thin film transistor, the data line isdisposed on the same layer as a source electrode and a drain electrodeof the thin film transistor; the pressure detecting electrode wiringsare disposed on the same layer as the gate line or the data line.
 5. Thetouch display panel according to claim 3, wherein the array substratefurther comprises auxiliary wirings located in a non-display area, theauxiliary wirings correspond to the touch electrode wirings one by one,and the auxiliary wirings are electrically connected to the touchelectrode wirings.
 6. The touch display panel according to claim 1,wherein, the opposed substrate further comprises a black matrix; thetouch electrodes are of a lattice structure, and located on a side ofthe black matrix closed to the array substrate and corresponding to theblack matrix; wherein, the touch electrodes have a material of metal. 7.The touch display panel according to claim 1, wherein, a capacitor isformed between each of the pressure detecting electrodes and at leastone of the touch electrodes overlapping therewith.
 8. A display device,comprising the touch display panel according to claim 1, and a firstintegrated circuit (IC) connected to the touch electrode wirings and asecond IC connected to the pressure detecting wirings.
 9. The displaydevice according to claim 8, further comprising a metal back shell, thetouch display panel is disposed on the metal back shell.
 10. The displaydevice according to claim 9, wherein, the pressure detecting electrodesare disposed on the array substrate, the array substrate comprises apixel electrode; the pressure detecting electrodes are closer to themetal back shell with respect to the pixel electrode on the arraysubstrate.
 11. The display device according to claim 9, wherein, acapacitor is formed between the pressure detecting electrodes and themetal back shell.
 12. A driving method of the display device accordingto claim 8, comprising: a touch phase in which the first IC inputs adrive signal to the touch electrodes through the touch electrode wiringsand receives a feedback signal to identify a touch position; a pressuredetecting phase in which the first IC inputs a fixed voltage signal tothe touch electrodes through the touch electrode wirings, the second ICinputs a drive signal to the pressure detecting electrodes through thepressure detecting wirings and receives a feedback signal to detect apressure value; and a signal line between the pressure detectingelectrodes and the touch electrodes is controlled in a high resistancestate; wherein, the signal line comprises at least one of a gate lineand a data line.
 13. The driving method according to claim 12, wherein,the display device further comprises a metal back shell, a capacitor isformed between the pressure detecting electrodes and the metal backshell, in the pressure detecting phase, the driving method furthercomprises: controlling a signal line between the pressure detectingelectrodes and the metal back shell in a high resistance state.
 14. Thedriving method according to claim 12, wherein, the display devicecomprises a third IC connected to the gate line and a fourth ICconnected to the data line, the driving method further comprising: adisplay phase in which the third IC inputs a scanning signal to the gateline in a line sequence, the fourth IC inputs a data signal to the dataline; and the first IC and the second IC input common voltage signals tothe touch electrodes and the pressure detecting electrodes,respectively; wherein, the pressure detecting electrodes are also usedas common electrodes.
 15. The driving method according to claim 14,wherein, in the touch phase, modulation signals with the same frequencyand the same amplitude as those for the touch electrodes aresimultaneously input from the second IC to the pressure detectingelectrodes, from the third IC to the gate line, and from the fourth ICto the data line.